about our practice

Rainbow Kids Pediatric Urgent Care is committed to provide compassionate, quality medical care in a welcoming environment by board-certified physicians specially trained in pediatric medicine. We believe that children require differentiated treatment from adults and deserve care specific to their needs.

Urgent Care vs Emergency room

There is a tremendous need for high quality pediatric care in our community, specifically after-hours and weekends. Hospital emergency rooms are often overrun, have extensive wait times, and serve a patient demographic of all ages. An ER visit can be arduous and expensive; adding unnecessary stress when you have an ill or injured child. Our Urgent Care will provide a more affordable alternative in a setting that will be conducive to the needs of children and their families. We offer convenient, accessible care for non-life threatening illnesses and injuries for children 17 and under. We take pride in being a trustworthy medical resource for your family; extending services beyond the hours of your pediatrician’s office, and offering care when previously the ER was the only other option.

We respect your time and finances and strive to provide optimized decision making to avoid unnecessary work ups and procedures in your child. We will be the voice offering sound advice and appropriate treatment and will only triage your child to the ER when absolutely necessary.

About Us

Combined, our group of diverse clinicians have accumulated over 50 years dedicated to the treatment of children. Our all-physician group received formal training in Pediatrics, Pediatric Critical Care and Pediatric Cardiology.

While our backgrounds vary individually, we have all cared for children in the office, pediatric emergency department, and hospital critical care units. This means your child will benefit from highly qualified doctors that have extensive experience in treating patients of various levels of acuity – from minor illnesses to extremely critical circumstances.

Meet the Team

  • Nhat Pham, DO

    Humility, excellence, compassion, and community are all core values that drive this physician. Dr. Nhat Pham is a compassionate and “Phamily”-oriented Pediatric Critical Care Physician based in Sacramento, CA. Dr. Pham returned to Northern California after a decade of training, driven by a heartfelt commitment to serve the community where he grew up.

  • Kathy Yimer, MD

    Dr. Kathy Yimer is a dedicated pediatrician who completed medical school training from St. George’s University in Grenada. Her journey continued with a pediatric residency at the Children’s hospital of New Jersey, followed by one year of pediatric critical care fellowship training at the University of California, Los Angeles. She currently balances her time between outpatient and inpatient pediatric medicine, providing compassionate care to children in the Greater Sacramento area. Outside of medicine, she finds joy in her role as a spouse and parent to three wonderful children as well as playing squash and kickboxing.

  • Muluneh Yimer, MD

    Dr. Muluneh Yimer is a dedicated pediatric cardiologist who completed medical school training at Addis Ababa University in Ethiopia. After a pediatric residency at Newark Beth Israel, followed by a three-year pediatric cardiology fellowship at Children’s Mercy Hospital in Kansas City, he boasts decades of experience in caring for children. Currently serving as a local pediatric cardiologist, Dr. Yimer is a loving spouse and parent to three beautiful children. Beyond medicine, he finds joy in playing ping pong and squash.

  • John H Duong-Tran, MD

    As an immigrant, Dr. John Duong-Tran grew up immersed in two beautifully diverse cultures. After graduating from high school at the age of fifteen, he obtained his Bachelor of Science in Biology and his graduate degree in Microbiology. He attended medical school at Oregon Health Sciences University and completed his residency in Pediatrics at Doernbecher Children’s Hospital. He practiced as a general pediatrician and a pediatric hospitalist for nearly six years in the Pacific Northwest prior to embarking on further fellowship training in Pediatric Critical Care at Rady Children’s Hospital in San Diego, CA. Dr. Duong-Tran has accumulated extensive expertise from practicing in the field of pediatrics for more than thirty one years.

  • Lisa Her

    Lisa graduated from University of Phoenix, receiving her Bachelor of Science Healthcare Administration and Bachelor of Arts Business Administration. She has over twenty-three years of experience in the medical field as a Medical Assistant and seventeen years of experience as a Health Center Manager overseeing daily operations in a large, multi-site clinic. Her settings ranged from a non-profit, a profit organization, and federally funded non-profit health centers (FQHC) which aid medically under-served communities and populations. As a leader, she's worked in an Ambulatory Health Care Accreditation program which provides a regional system of community health centers offering primary care, chronic diseases management, pediatric care, women’s health, family dental services, integrated behavioral health services, immediate care services, health education, and prevention services. As a manager, she leads a team of administrative and clinical colleagues.

How “Rainbow Kids” came to be

The name “Rainbow Kids” was inspired by our son’s favorite book at the time, Noah’s Ark. When asked about his favorite color, he always replied “rainbow.” Over time, we also came to see the profound significance of a rainbow in our lives. It symbolizes God's promise to the world and serves as a reminder of His love and how we can use our talents to serve others in a way that fulfills God's will, which is love. This symbolism is echoed in the book of Ezekiel, where on the 4th month, the prophet describes a vision of God’s glory as “a rainbow in a cloud on a rainy day.” Remarkably, after a series of delays, Rainbow Kids Urgent Care finally opened its doors on the 4th  month of the year, on a rainy day, which was followed by a beautiful rainbow.


Rainbow Kids Urgent Care is made up of physicians and staff from backgrounds as diverse as a rainbow, yet we are united by a common mission: to use our talents to care for EVERY child, regardless of their background, and to express God's love through our work.

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